Steps to reproduce:

Open a new worksheet in excel.
in a cell type the text:

este é um teste de pronuncias de palavras digitadas no nvda quando a opção de anunciar palavras digitadas está ativa no nvda

Expected behavior:

nvda should read the complete words by pressing the space key.

Actual behavior:

when pressed space some words are pronounced cut or are not pronounced informing space when entering the space key.

System configuration:

NVDA version:

Example: next-14675

NVDA Installed or portable:
instaled

Other information:

Windows version:

Example: Windows 10 Version 1709 Build 16299.64

Name and version of other software in use when reproducing the issue:
excel 16.0.8625.2032

Other questions:

Does the issue still occur after restarting your PC?
yes

Have you tried any other versions of NVDA?

Please list them and the result

no

for the tests the option to speak typed words must be active in the nvda.
My language is in Portuguese, I did not test in other languages.
I tested it with several voice synthesizers and plug-ins disabled.
One thing to check is that excel suggests some words when typing in cells, however nvda does not support this feature.
This problem only occurs in excel, in other text editors like word everything works fine.